[sdmmc] sdmmc_handle_cpu_transfer: handle unaligned buffers

Fix struct tegra_sdmmc definition ...

Definition errors were cancelling each other (for the most part)

[sdmmc] Fix const-correctness issue

Use latest sdmmc driver in stage2

Add raw_mmc_dev (untested!)

Rename g_devices to g_fsdev_devices

Merge branch 'master' of github.com:Atmosphere-NX/Atmosphere

Rewrite condition in fsdev_seek

Exosphere: Add API for retrieving versioning info.

Refine error in fsdev_mount_device

Make stdout line-buffered

Fix FindDevice and RemoveDevice calls in fs_dev.c

PM: Fix missing flags set/missing wait. Now works on 5.x.

O_RDONLY is 0

Rewrite package2.c

Boot: Fleshing out more low level stuff ...

Add register read/write for 2.0.0+ (with svcReadWriteRegister)
Add hardware type recognition
Implement PMC clock out configuration
Implement PINMUX park updating

Change the allocation logic in stratosphere.c

Refactor stage1's and stage2's main.c files

Don't deinit the display yet, for now

Fix bug in crt0

Make di.c accept arbitrary FB addresses, fix flickering issues

[stage2] Forgot to change that, too

Fix faulty IRAM check in check_32bit_address_range_in_program

Fix inverted condition issue in check_32bit_address_range_loadable

[stage1] Fix DEFAULT_BCT0_FOR_DEBUG

Rewrote crt0, init, and chainloading code ...

start.s, init.c, linker.ld and linker.specs are meant
to be re-used by user applications, should they remove the defines
from init.c and the .chainloader* sections from the linker script

Simplify fsdev_set_default_device

Loader: Fix char * const correctness.

SM: Match official SAC validation behavior.

Loader: Fix game update content loading, fix SD card mounting on newer firmwares. Closes #61.